Reversible grinding-machine.



No. 684,547. Patented Oct. I5, l90l. H. D. HIBBARD.

REVERSIBLE GRINDING MACHINE.

(Application filed May 9. 1901.\ (No Model.) 3 Sheets-Sheet I.

' I Byhzisfldorney, I

m arms no. wwmoummwunmmou u r Patented Get. 15, l90l.

H. D. HIBBARD.

REVERSIBLE GRINDING MACHINE.

(Application filed May 9 1901.)

3 Sheets-Sheet 2.

(No Model.)

zzveniat'f Henryflfiz'bbard ByhzSJZZZar-n e y- MM No. 684,547. Patented Oct. l5, IQOI. H. D. HIBBARD.

REVERSIBLE GRINDING MACHINE.

(Application filed May 9. 1901.)

(No Model.) 3 Sheets-$heei 3.

w: roams versus co. Pnmo-u'mo', WASHINGTON. n. cy

NITED STATES PATEN Fries.

HENRY DEMING IIIBBARD, OF PLAINFIELD, NElV JERSEY.

REVERSlBLE GRINDING-MACHINE.

SPEGIFIGATION forming part .of Letters Patent N 0. 684,547, dated October 1901- Applieation filed May 9, 1901- Serial No. 59,374. (No model) To (LU whom it may concern:

Be it known that I, HENRY DEMING llIB- BARD, a citizen of the United States, residing in Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Reversible Grinding- Machines, of which the following is a specification.

This invention relates to grindingmachines; and the object of the invention is to provide a grinding or finishingmachine having a rotary face-plate capable of adjustable automatic reversal.

A further object of the invention is to provide a grinding-machine wherein the work is carried upon one or more rotary face-plates which may be reversed by automatic adjustable'means.

Another object of the invention is to provide a grinding-machine wherein the work is carried upon one or more rotary face-plates which may be reversed by automatic adjustable means, and which grinding may take place at more than one point upon the work; and a still further object of this invention is to provide a grinding-machine wherein the Work is carried upon one or more rotary faceplates, and which may be reversed by automatic adjustable means, the grinding operation being continuous, when desired, irrespective of the direction in which the work is being rotated.

The grinding-machine shown herein and described is particularly adapted for use in connection with safes or vaults, and especially to that form of safe or vault which is made of unmachineable metal, such as manganese steel. In the manufacture of safes of manganese steel it is impossible to work the metal by cutting. Consequently it is necessary to work such metal by grinding, this being the only practicable mode known at the present time. When the safe or vault is provided with a circular portionas, for instance, a doorway-it is necessary at the presout time in the grinding of such circular part to carry the tool entirely around such part during each grinding action. Frequently there are imperfections or projecting portions necessary to be removed, which, however, it is impossible to work upon successively except by carrying the tool entirely around the so that it is necessary to provide means whereby any particular part of the article being ground can be successively treated without the necessity of working entirely around the circular part each time. For this purpose is provided improved means whereby the mechanism which rotates, such as a face-plate carrying the safe or vault or other article to be worked, can be automatically reversed, thereby to rotate the face-plate in different directions and enable the tool to operate over a short portion of the work-as, for instance, a safe or vault-in succession, and for this purpose is provided an improved grinding-machine which comprises in a generalway one or more rotary face-plates adapted to carry an object to be operated upon, one of which face-plates carries adjustable means adapted to be located in various positions and cooperating with means for shifting the operating mechanism, and which means in the form shown comprises belt shifting means suitably connected with the power mechanism or driving mechanism.

In the drawings accompanying and forming apart of this specification, Figure 1 is aside elevation of one form of this improved machine. Fig. 2 is a plan view thereof. Fig. 3 is a perspective view showing a form of reversing device and a faceplate; and Figs. at

and 5 show the application of a cutting-tool,

which may be used in place of a grindingwheel in some instances. Similar characters of reference designate corresponding parts in all the figures of the drawings.

In the form of grinding-machine herein shown and described and which may be its preferred form, if desired, the device com.- prises one or more rotary members, such as face-plates, adapted to carry the article to be worked. Two face-plates 1O 11 are shown in the present instance, connected by a shaft 12, supported by some suitable supporting means 13, such as two-part bearings resting upon a suitable bed 14:. The power is here shown as applied to a pulley 15, mounted on a shaft 16, carried by bearings supported by standards, on which shaft is a fast pulley 18, over which run an open and a crossed belt 21 22, respectively, which belts also run over a set of fast and loose pulleys 23, 24, and 25, carried by a shaft 26, having suitable bearings, and which is connected, by means of a chain of gearwheels 27, 28, 29, 30, and 31, with an integral gear formed on one of the faceplates, as 10. In place of the crossed belt a belt running in the opposite direction could be used, in which case a separate power.

shaft similar to shaft 16 would be provided. The belts 2.1 22 are here shown as adapted to be shifted backward and forward on their fast and loose pulleys by means of belt-shifting means, such as loops 32,33, carried by a reciprocating rod 34: and supported by suitable hangers. A rock-shaft 35, havingacrank 36 in engagement with the reciprocating rod of the belt-shifter, is provided at its outer end with arms 37 38. Carried by one of the face-plates (here shown as 11) are clamps 39 40, secured to the flange by means of setscrews 39 40, respectively. These clamps are respectively provided with projecting fingers or lugs 41 42. In the path of these lugs or fingers 41 42 the arms 37 38 of the rockshaft are located to alternately be interposed. There is also provided on the rock-shaft 35 a lever 43, provided for manually operating the belt-shifting device. The face-plates are respectively provided with bolt-kerfs 10 11. Opposite each face-plate is shown the grinding mechanism, in the present instance comprising two grinding-wheels 44, mounted on carriages 45, slidable upon bed-plates 46. At times it may be found desirable in operating upon certain classes of work-for instance, when the article to be treated is formed of other than unmachineable metalto substitute a cutter for one or more of the grindingwheels, and in Figs. 4 and 5 a convenient form of cutter is shown mounted on a carriage 45 and adapted to slide on the bed -plate 46 and comprises a tool 47, set in a tool-post 47, pivoted at 47 and when in work bearing against a support 47 This organization permits the tool to freely drag over the work when running in one direction and to cut when runn'in'gin the opposite direction. When a cutting-tool is used, it may be desirable to drive backward at a higher speed than when cutting. In this case each belt would have its own .tight and loose pulley mounted on the shaft 26, the proportions of the pulleys being made suitable to provide for the desired speed.

The operation of the machine is as follows: Work being bolted on either or both of the faceeplates by means of bolts and bolt-kerfs in the usual manner and the power applied, the belts being in the position indicated in Fig. 2 and moving in the direction indicated by the several arrows, the face-plates will rotate in the direction of the arrows thereon. The lug or finger 41 will come in engagement with the arm 37, which will partially rotate the rock-shaft 35, which through its crank 36 will reciprocate the rod 34 and by means of the belt-shifting loops 32 33 shift the crossed belt 22 onto the fast pulleys and at the same time shift the open belt 21 off of the fast pulleys 18 23 and onto the loose pulleys 19 24, which will, operating through shaft 26 and chain of gears 27, 28, 29, 30, 31, and 10 change the direction of rotation of the faceplates. Then the lug 41 engaged the arm 37, it rocked the shaft and shifted the arm 38 into the path of the other lug 42, so that it is in position to be engaged by said lug 42 upon the opposite rotation of the face-plates. The clamps 39 and 40, being provided with set-screws or any other suitable clamping means 39 and respeetively,may be shifted to any desired point on the flange of the faceplate to adj ustably limit the amount of rotation thereof. For the purpose of laterally adjusting the face-plates some convenient means may be employed, and in the drawings such a means is shown, which may comprise a collar 12, loose on the shaft 12 and in contact with one of its bearings and which is adapted to be set against the bearing by setscrews 12 carried by cars 12 on the shaft, and it will be readily observed that by screwing in the set-screws they will push the collar along the shaft and against the bearing and move the face-plate 10 in the opposite direction. In Fig. 2 the invention has been shown as applied to a grinding-machine having two face-plates each provided with a set of two grinding-wheels; but I do not limit myself to the number of face-plates nor the number or organization of the grinding de-- vices, and although I have shown two faceplates, one being operated upon by the driving mechanism and the other carrying the reversing mechanism, yet the machine may be constructed with but a single face-plate,which may carry the reversing-mechanism-operating devices, or the same may be mounted upon an independent means carried by the shaft of the face-plate or otherwise operated by it.

In the present instance the invention is shown as applied to a grinding-machine, to which it is particularly adapted; but it is to be understood that in practice it may be applied to a finishing-machine.

The various parts of the machine are here shown as operated by electric motors and the reversing means shown as belts running over fast and loose pulleys and operated by a belt-shifter, yet any ordinary and suitable means may be employed for the accomplishment of the same results.

Having described my invention, I claim 1. In a gi'indingmachine, the combination, with a rotary face-plate, of driving means therefor, and means controlled by such faceplate for reversing said driving means.

2. In a grinding-machine, the combination of a rotary face-plate; driving means there for; and means carried by said face-plate for reversing said driving means.

3. In a grinding machine, the combination,

with a rotary face-plate, of driving means therefor; reversing means for the driving means; and automatic means for reversing the driving means.

4. In agrinding-machine, the combination, with a rotary face-plate, of driving means therefor; reversing means for the driving means; and rotary automatic means for reversing the driving means.

5. In a grinding-machine, the combination, with a rotary faceplate, of driving means therefor; reversing means for the driving means; and rotary adjustable automatic means for reversing-the driving means.

6. In agrinding-machine, the combination, with a rotary face-plate, of power-reversing means, and automatic means for reversing said plate at any point in its rotation and comprising means shiftable with the shaft of the face-plate and cooperative with said powerreversing means.

7. In agrinding-machine, the combination, with an adjustable grinding-wheel, of a rotary face-plate adapted to hold and carry the work therefor and having an internal gear; means for imparting rotary motion to said face-plate; and means operative by the faceplate for automatically reversing its motion.

8. Inagrinding-machine, the combination, with two sets of adjustable grinding-Wheels, of axially-mounted face-plates adapted to hold and carry the Work therefor; means for imparting rotary motion to the face-plates; and means operated by one of the face-plates for automatically reversing the motion of both.

9. In agrinding-machine, the combination, with a reversible rotary face-plate, of a grindin g-wheel operative upon the Work carried by the face-plate in either direction of its rotation.

10. In a grinding-machine, the combination, with grinding means, of rotary means adapted to carry the Work for the grinding means; means for reversibly operating the Work-carrying means; and adjustable automatic means for actuating the reversing means, all organized to permit grinding in both directions of rotation.

11. In a grinding-machine, the combination, with a rotary face-plate adapted to carry the work, of driving means for rotating said plate reversing means for said driving means; adjustable means for automatically controlling said reversing means; and independently-adjustable grinding means operative upon the Work at more than one point simultaneously.

12. In a grinding-machine, the combination,with rotary face-plates independently capable of carrying the work, of driving means for rotating said plates; reversing means for said driving means; adjustable means for antomatically controlling said reversing means; and a set of grinding means comprising two or more independent adjustable members operative upon the Work of each face-plate at diiferent points thereof respectively.

13. The combination, with a rotary face plate, of driving means therefor; reversing means for said driving means and embodying a pair of belts, one running in one direction and the other in the opposite direction; and means carried by the face-plate and cooperative with said reversing means for reversing the direction of movement of said plate.

14. The combination, Withashaft, of a pair of rotary face-plates mounted thereon, one of said plates having an internal gear; driving means; gearing connecting said driving means and said internal gear; means for reversing said face-plates and including shiftable belts, one a crossed belt; and adjustable means carried by one of said face plates for controlling the shifting of said belts.

15. The combination, with a shaft, of a pair of face-plates carried thereby and of different diameters, one of said face-plates having an internal gear; driving means; gearing connecting said driving means with said inter nal gear; reversing means for said driving means and embodying a rock-shaft; and adjustable means carried by one of said faceplates for rocking said shaft, thereby to shift said belts.

HENRY DEMINGI'IIBBARD.

Witnesses:

O. S. WEED, O. L. RUssELL. 

